One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,12)(5,7)(6,10)(8,14)(11,16)(13,15)(17,18)(19,23)(20,25)(21,24)(22,27)(26,34)(28,37)(29,36)(30,38)(31,39)(32,41)(33,35)(40,45)(42,47)(43,48)(44,46) involution — undirected(1,3,5,11)(2,6,7,15)(4,13,14,10)(8,16,12,9)(17,19)(18,23)(20,29)(21,33)(22,28)(24,38)(25,36)(26,35)(27,37)(30,34)(31,44)(32,42)(39,48)(40,46)(41,47)(43,45)(18,24,27,26)(19,28)(23,35,37,38)(25,39,41,40)(29,42)(30,33)(36,46,47,48)(43,44)(2,7)(6,15)(8,12)(9,16)(17,20,22,32)(18,25,27,41)(19,29,28,42)(21,31,34,45)(23,36,37,47)(24,39,26,40)(30,43,33,44)(35,46,38,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.